I NEED TIPS FOR YEAR END TAX FILING?

I have the tiny commercial operation only proposed final year so it will be the full year this July. I can’t means an accountant yet. I do have an Accounting diploma though never work in which dialect so we could cruise me an pledge in which regard.
I need to know what is the most appropriate accounting or bookkeeping program for monetary statements as well as taxation filing, formed upon your experience. My commercial operation is in sell as well as service.