Depends on the make up of the refund ... many refundable credits are not taken into consideration for the service: https://ttlc.intuit.com/turbotax-support/en-us/help-article/intuit-account-billing/pay-refund/L9ME4a...
So if your non credit refund is not enough ... your options are :
1) If your AGI is $73K or less you can start again using one of the totally free programs at the IRS FREE FILE site here :
https://www.irs.gov/filing/free-file-do-your-federal-taxes-for-free
2) stay with TT and pay the fees upfront with your credit/debit card and SAVE yourself the extra $40/$45 fee on top of the TT fees. If you don't have one maybe a family member or friend will help you out. Or for $5 you can buy a pre paid debit card at almost any major store, load just enough on the card needed to pay the TT fees and register the card online using a US based address. Then you can use the debit card to get the refunds direct deposited to that account ... check with the debit card bank for the correct routing & bank account numbers for your debit card account ... it will NOT be the number on the card.
3) find another way to file ... the IRS has fill in the blank forms that you can mail in (check with your state for their forms). https://www.irs.gov/forms-instructions
