Hi , we received a deposit refund from our rent but the said money was from our hq but on their book it was not reflected. can i declare it as ur other incm on our book?

Yes, if a deposit was made and not properly recorded on the balance sheet as a security deposit, when you add that money to your bank account, that would likely be counted as Other Income.

Then you probably get to pay income taxes on that money for a second time.