If the envelopes were postmarked by the filing deadline of 4-15 (and you say you mailed it on 4-12) it is "on time" even if it takes the IRS/state a few extra days to cash the checks. Just watch your bank account for the payments to be posted.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
