What to include when mailing tax returns

Hello.  This year unfortunately I have to mail my tax return instead of e-filing due to a bug within the TurboTax software that is preventing e-filing (verified already with support).  What do I include for both my federal and PA tax returns?  I ask because TurboTax guidelines seem to conflict with what can be found online.  For Federal, TurboTax says to only include W-2s, however online I am seeing instructions to send W-2s, all 1099s, mortgage statements, etc.

 

For PA, there are no specific instructions from TurboTax, however I am reading that there are similar requirements: W-2s, all 1099s, mortgage statements, etc.