DIDN’T RECEIVED TAX CONFIRMATION

I need someone to answer this inquiry, hoping to get an answer.

Those new clients of mine don’t have any record kung ilalagay ko ang TIN nila sa pag fill up ng eBIR form, I encode all the required details (TIN, Name, RDO, Line of Business, etc.) then nagfill up na ako ng 2551Q. However, up until now I didn’t received any tax confirmation from the email na nilagay ko. I am 100% sure na na-submit ko before the deadline.

What to do? Or may explanation ba sa ganito?