Return EDATE with an IF statement...? [SOLVED]

I searched the forums for EDATE but I didn't see anything that helped me, quite.

This is the current formula:

=IF(R2<20,"",IF(M2="Pre-QA",N2,IF(M2="Pending",N2,IF(U2=0,N2,O2))))

Where N2 and O2 are both dates.

I want the formula to change those to the end of the month for this cell but I can't figure out where to/how to put the EDATE bit in.

Help? Thanks!