Tax miscalculation

Hi everyone

I'm an auto entrepreneur and realised I had miscalculated my URSSAF and tax declaration for 2013. I worked out I probably owe 460 euros more. What is likely to happen?

Thanks for the advice. As their way, no doubt, I managed to get the attestation I needed without a word of explanation as to why they withheld it.

My advice is just send them a cheque with a note explaining and saying sorry. I’m sure they have bigger fish to fry.