How do I correct an over declaration?

nabius

24 Jan 2014 at 18:29 · Viewed 1511 times

I am an English language trainer and have just completed my declaration for the 4th trimester. When I added up all my declarations of receipts and tallied it with my bank statements I found I had over declared on the 3rd trimester by about 700 euros.

Should I just leave it as it is or should I take the difference from the 4th trimester? I think I can modify payments declared until 31st, but this would mean I was not making an accurate declaration for the final trimester. If I did this my income and receipts for the year overall would be correct.
I received letters from Humanis and Agirc/Arrco two years ago when I became an auto-entrepreneur but ignored them. My husband has just become an auto-entrepreneur and has received the same letters. Are they for retraite complementaire - as in a mutuelle for health and are they optional or need to answering?
Can we continue to make a joint tax submission as I did in May, or what is the best thing to do?

Answered