Mehere

I started my business in September last year, I've kept all purchased and sold receipts but my record keeping hasn't been efficient enough. I buy and sell computer parts and buy lots of the same model computer and sometimes separate it (e.g. sell the computer separately from the mouse) My problem is I haven't completed the tax return yet and haven't sold all my stock bought from last year. There is no way to link the receipts to which particular product i bought from last year. How do I go about recording all the leftovr stock from last tax year into this tax year? As if I sell them now it will appear as clear profit?