Just learned my return was rejected, it's the 23rd and I efiled w turbotax on the 15th, I have corrected issue and entered my irs pin and resent my return

you had five days to make that  correction, but you should be OK

I want to be certain, otherwise I could pay a penalty, and my return is already pretty small

Any way I can confirm I won't be penalized?

Thanks

If you are due a Federal refund, there is no penalty for a late Federal return.  State rules might vary.