I would go with a guestimation.
Now here is the bigger problem. If you purchased your supplies tax free because you are a buisness, the govt expects you to collect sales tax on every bar that is no longer in your possesion. That means the bars you sold, the bars you donated to charity, the bars you used yourself & the bars you gave away. The tax man made a visit to my shop to explain this to me, so I am positive about this. When you do not pay taxes on a supply, you are making a promise to the govt that you in turn will require someone esle to pay that taxyou avoided. If at the end of the year you donate 200 bars of soap to your local womens shelter & they carry a retail value of $5.00 per bar & your state retail sales tax is 8%, you owe 200 bars X $5.00ea= $1000 x 8% sales tax + you owe the govt $80.00. You will probably be able to take those bars at a write off, but you still owe the sales tax on them.
That is one thing the begining and ending inventory is for. If you started w/ 5000 bars(or enough supplies to make that many) & ended with 1000 bars but only collected tax on 100 bars, they can see it doesn't add up corrcetly.
Now here is the bigger problem. If you purchased your supplies tax free because you are a buisness, the govt expects you to collect sales tax on every bar that is no longer in your possesion. That means the bars you sold, the bars you donated to charity, the bars you used yourself & the bars you gave away. The tax man made a visit to my shop to explain this to me, so I am positive about this. When you do not pay taxes on a supply, you are making a promise to the govt that you in turn will require someone esle to pay that taxyou avoided. If at the end of the year you donate 200 bars of soap to your local womens shelter & they carry a retail value of $5.00 per bar & your state retail sales tax is 8%, you owe 200 bars X $5.00ea= $1000 x 8% sales tax + you owe the govt $80.00. You will probably be able to take those bars at a write off, but you still owe the sales tax on them.
That is one thing the begining and ending inventory is for. If you started w/ 5000 bars(or enough supplies to make that many) & ended with 1000 bars but only collected tax on 100 bars, they can see it doesn't add up corrcetly.