It is not necessary to pay someone to complete your FAFSA. Save your money for school! You (and your family) know your family situation best. When you are completing the FAFSA, you can simply use the IRS Data Retrieval Tool to link your tax information from the IRS to your FAFSA. Using this tool can save you time in the future, preventing you from being required to submit an IRS tax transcript in the case that you are selected for verification.
If you haven't yet filed your tax returns for the previous year, it is acceptable to estimate your income on the FAFSA and you will be asked to update the information later.