Yes, you can pay federal taxes in cash at participating retail locations through the IRS's Official Payments program using PayNearMe (7-Eleven, CVS, and other stores). You register on the IRS website, receive a code, and bring cash to the retail location. Payments are limited to $1,000 per day and carry a small service fee. Unlike payments by check or money order you cannot mail cash to the IRS. The cash payment option is designed for people who don't have a bank account or prefer not to pay electronically.