A computerized system and method for preparing at least one tax return, including, but not limited to: accepting tax information, by at least one accounting module, for the at least one tax return from at least one user; processing the tax information, at the at least accounting module, so that at least one third party tax software application can utilize the tax information to calculate the at least one tax return; and providing calculated results of the at least one tax return, from the at least one accounting module, to the at least one user; wherein third-party software is utilized to calculate the at least one tax return so that the at least one accounting module does not need to calculate the at least one tax return.