If I don’t provide direct deposit information in my tax return, how will that affect my refund?

According to the Taxpayer Advocate Office, once the return has been processed, the taxpayer(s) will be sent a letter requesting the bank account information be provided within 30 days of the letter date. The letter will also contain a dedicated phone number that can be used request an exception and issuance of a check. After six weeks, a paper check will be sent to the taxpayer(s).