this is 100% correct
e----------------------------------------------------
b----------------------------------------------------
g-------------7-7-7-7--------------------------------
D--5-5----5-5-x-x-x-x---------------------------------
A--5-5----5-5-5-5-5-5--------------------------------
E-/3-3--0-3-3----------------------------------------
e----------------------------------------------------
b----------------------------------------------------
g---4---5-----4---2-----------------------------------
D-5-5-4-4---2-2-4-4-----------------------------------
A----------------------------------------------------
E----------------------------------------------------
chorus
[ Tab from: https://www.guitartabs.cc/tabs/b/boxcar_racer/i_feel_so_tab_ver_4.html ]
e--------------------------------------------------------------
b--------------------------------------------------------------
g--------------------------------------------------------------
D--2-2-2-2-2-2-2-2-2-2-9-9-9-9-9-9-9-9-9-9-6-6-6-6-6-6-6-6-6---
A--2-2-2-2-2-2-2-2-2-2-6-6-6-6-6-6-6-6-6-6-4-4-4-4-4-4-4-4-4---
E--0-0-0-0-0-0-0-0-0-0-----------------------------------------
after chorus strum along w/ snare drum
e---------------------I-----------------------------------------
b---------------------I-----------------------------------------
g---------------------I-4-4-4-4-4-4-4-4-4-4-4-4-4-4-4-----------
D-9-9-9-9-9-9-9-9-9-9-I-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-----------
A-6-6-6-6-6-6-6-6-6-6-I-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-----------
E---------------------I-----------------------------------------
and that's it.