My suggestion would be to set the earliest transaction date to April 30th or earlier just so that entries can be made in the prior year if required to set up the accounts properly. Once this is done I would then enter the adjusted year end trial balance which includes all of the accountant's entries by using one large (multi line) general journal. Once this is entered you will then have to enter the historical information for each customer and vendor. Again, I would only enter the amounts outstanding at conversion. This is done through the historical entries so that they will not affect the sales and purchases for each customer and vendor. When all is entered then you can run an April 30th year end to compare to the Financial Statements as prepared by the accountant. All complete - good to go, move into the next year and continue entering each transaction.
If you have already started using the program for the new year data then make all of the above entries as on May 1st. Then you can run financial statements as of May 1st to compare to the prior year. Remember, if you entered any of the new year entries with an effective day of May 1st your statements will have to be manually adjusted to reflect the year end.

Thank you so much! I will change my earliest transaction date to April 30th