What this means, is that everything you submit will be based on April 6, 2017 until April 5, 2018. If you have not yet completed your taxes for this year yet (which I imagine is unlikely), PLEASE work with a good accountant and us to ensure your tax return reflects that you will make the required amount necessary to sponsor Amy and her children. If an error is made (to save on tax), you will have to wait until your accounts from April 6, 2018 to April 5, 2019 are complete.