ok me and my friend tabbed this and i play it with the song and it sounds right to me.
INTRO (you can play with the guitar rythem)
1 -----------------------------------------
2 -----------------------------------------
3 44444444---------------------------------
4 --------444444442222222244444444---------
VERSE (these are quarter notes)
1 -----------------------------------------------------------------------------
2 -----------------------------------------------------------------------------
3 4444----4444----4444------------4444----4444----4444------------1111----4444-
4 ----4444----2222----444422222222----4444----2222----444422222222----2222-----
1 -------------
2 -------------
3 ----1111-----
4 4444----2222-
[ Tab from: https://www.guitartabs.cc/tabs/g/good_charlotte/the_anthem_btab_ver_2.html ]
CORUS (The only questionable part)
1 -----------------------------------------
2 -----------------------------------------
3 --------44------44------44------44-------
4 44444444--442244--442254--442244--442244-
REPEAT INTRO THEN VERSE AND CORUS AGAIN THEN
BRIDGE
1 -----------------------------------------------------------------
2 -----------------------------------------------------------------
3 1111------------11114444--------4444----4444----4444-------------
4 ----444422224444--------44444444----4444----2222----444422222222-
THEN THERE IS A SHORT BREAK WHERE THERE IS NO BASS BUT THEN YOU COME BACK IN IF
YOU LISTEN TO THE SONG YOU CAN TELL WHEN THE BASS COMES BACK IN ENDING
1 -------------------------------------------------
2 -------------------------------------------------
3 44------44------44------44------44------44-------
4 --442244--442244--442254--442244--442244--442244-
OUTRO
1 --------------------------------
2 --------------------------------
3 44------44------44------44----4-
4 --442244--442244--442244--4424--
THAT'S THE END I AM REALLY SURE THAT IT IS RIGHT