This sounds right to me, its all by ear so, enjoy!
* = palm mute
b = bend
ph = pinch harmonic
1st verse
e|-----------------------------------------------------------------------|
B|-----------------------------------------------------------------------|
G|-----------------------------------------------------------------------|
D|-----------------------------------------------------------------------|
A|-2-2-2-2-2-2-2-2--------------------6-6-6-6-6-6-6-6--4-44-4-6-4--------|
D|-------------------2-2-2-2-2-2-2-2-------------------------------------|
* * * * * * * * * * * * * * * * * * * * * * * * * **
e|-----------------------------------------------------------------------|
B|-----------------------------------------------------------------------|
G|-4-4-4-4-4-4-4-4------------------------------------6-6-6-6-6-6-6-6----|
D|-4-4-4-4-4-4-4-4--2-2-2-2-2-2-2-2--8-8-8-8-8-8-8-8--6-6-6-6-6-6-6-6----|
A|-2-2-2-2-2-2-2-2--2-2-2-2-2-2-2-2--9-9-9-9-9-9-9-9--4-4-4-4-4-4-4-4----|
D|------------------2-2-2-2-2-2-2-2--6-6-6-6-6-6-6-6---------------------|
* * * * * * * * * * * * * * * * * * * *
\
\
\
\
repeat this second bar 2x without *
Pre-Chorus
e|-------------2--------------14--11---------------| |----------|
B|--2--4--0--4--0--2-4-2-0--0----------------------| |----------|
G|-------------------------------------------------| or |----------|
D|-------------------------------------------------| |-2-2-2---2|
A|-------------------------------------------------| |-2-2-2---2|
D|-------------------------------------------------| |-2-2-2---2|
Chorus
e|-------------------------------------------------------------------|
B|-------------------------------------------------------------------|
G|-4-4-4-4-4-4-4-4---------------------------------------------------|
D|-4-4-4-4-4-4-4-4--4-4-4-4-4-4-4-4--2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-|
A|-2-2-2-2-2-2-2-2--4-4-4-4-4-4-4-4--2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-|
D|------------------4-4-4-4-4-4-4-4--2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-|
e|-------------------------------------------------------------------|
B|-------------------------------------------------------------------|
G|-------------------------------------------------------------------|
D|-6-6-6-6-6-6-6-6--4-4-4-4-4-4-4-4--2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-|
A|-6-6-6-6-6-6-6-6--4-4-4-4-4-4-4-4--2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-|
D|-6-6-6-6-6-6-6-6--4-4-4-4-4-4-4-4--2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-|
[ Tab from: https://www.guitartabs.cc/tabs/m/mayday_parade/demons_tab.html ]
e|-------------------------------------------------------------------|
B|-------------------------------------------------------------------|
G|-4-4-4-4-4-4-4-4---------------------------------------------------|
D|-4-4-4-4-4-4-4-4--2-2-2-2-2-2-2-2--6-6-6-6--4-4-4-4--2-2-2---2-2-2-|
A|-2-2-2-2-2-2-2-2--2-2-2-2-2-2-2-2--6-6-6-6--4-4-4-4--2-2-2---2-2-2-|
D|------------------2-2-2-2-2-2-2-2--6-6-6-6--4-4-4-4--2-2-2---2-2-2-|
* * * *
e|------------------------------------------------------11-----------|
B|---------------12---12-11--11-12-----------------12------11--------|
G|-11---11-9---9--------------------11---11-9---11-------------------|
D|----9------9------9------9-----------9------9-------9--------------|
A|-------------------------------------------------------------------|
D|-------------------------------------------------------------------|
Repeat 1st verse
2nd Pre-chorus
e|-------------------------------------------------------------------|
B|-4-5-7-5-4-5-2--4-5-7b+ph------------------------------------------|
G|-------------------------------------------------------------------|
D|-------------------------------------------------------------------|
A|-------------------------------------------------------------------|
D|-------------------------------------------------------------------|
Repeat Chorus
Bridge
e|12-12-12-12-12-14-14-12-9-9-9-9-9-12-12-11-7-7-7-7-7-9-9-11-7-7-7-7-9-9-9|
B|-------------------------------------------------------------------------|
G|-------------------------------------------------------------------------|
D|-------------------------------------------------------------------------|
A|-------------------------------------------------------------------------|
D|-------------------------------------------------------------------------|
^4 1/2x
Pre-Solo
e|--------------------------------------------|
B|--------------------------------------------|
G|-8-8-8-8-8-8-8-8-8-8-8-8-3-3-3-3------------|
D|--------------------------------------------|
A|-6-6-6-6-6-6-6-6-6-6-6-6-1-1-1-1------------|
D|--------------------------------------------|
Solo
e|-------------------------------------------------------------------------|
B|-12-12-12-12-12-12-12-12-12-12-12-12-12-12-12-12-12-12--19-19-19-17-17-17|
G|-------------------------------------------------------------------------|
D|-------------------------------------------------------------------------|
A|-------------------------------------------------------------------------|
D|-------------------------------------------------------------------------|
e|--------------------------------------------|
B|-16-16-16-17-17-17-14-14-14-14-14-14-14b----|
G|--------------------------------------------|
D|--------------------------------------------|
A|--------------------------------------------|
D|--------------------------------------------|
Repeat Chorus
And that's it! hope you liked it!