Quarterly report pursuant to Section 13 or 15(d)

K. COMMITMENTS AND CONTINGENCIES (Details-Sales Tax Accrual)

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K. COMMITMENTS AND CONTINGENCIES (Details-Sales Tax Accrual) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Change in the sales tax accrual    
Balance, Beginning of year $ 43,400 $ 83,282
Sales tax collected 56,314 101,145
Provisions (7,706) 30,465
Interest and penalties 0 0
Payments (32,823) (171,492)
Balance, End of period $ 59,185 $ 43,400