Okay, I'm just posting the main riffs of the song, you can easily figure where they go.
It starts with a Em chord, or if you prefer a E5. Then goes the main riff of Enter
which is this one:
|------------|
|------------|
|------------|
|------------|
|-----/7-----|
|-0-0----6-5-|
p p
And here comes the riff of Taxman, transposed to E:
|------------|
|------------|
|------------|
|------------|
|---7-----5v-|
|-0---5h7----|
[ Tab from: https://www.guitartabs.cc/tabs/b/beatallica/sandman_tab.html ]
During the vocals, it's two times this riff, a guitar plays two E5 while the other one
two times the riff above and back to the start.
And the "chorus" is:
|------------|------------|------------|------------|
|------------|------------|------------|------------|
|---7-----5v-|---7-----5v-|------------|------------|
|-----5h7----|-----5h7----|---7-----5v-|------------|
|-5----------|-5----------|-----5h7----|---7-----5v-|
|------------|------------|-5----------|-0---5h7----|
There are no more riffs, listen to the song to figure what part goes where and that's all.
Have fun with Beatallica.