Steps on Filling Returns using Self Service Portal

Visit the FCTIRS Self Service Portal at fcttaxportal.fctirs.gov.ng/selfservice/account/signin
Enter your TIN and password to login or click on the register button in case you are yet to register and follow the registration process
Click on the Menu button and Select Tax Returns
On the Tax Returns click on the File Returns
Click on File a New Return button
On the New Return Page, enter assessment date and assessment year and click on Generate Returns Reference Number button
On the Assessment Page enter the required information on part A, B, C, and D and submit your filling for approval.