When generating a TXF file, this error may appear if there is a sales amount less than zero in the file.
There are situations where a sale amount for a trade is less than zero. For example: If a stock or option is sold at such a low price that the commission is more than the amount of the sale, then a negative sales amount will result.
Many popular tax software programs cannot handle a negative sales amount, such as TurboTax®. Therefore a sales amount in the TXF file cannot be negative.
We are not aware of any solution in TurboTax®, if this exists in your account you will need to research options with TurboTax®, or other tax software. Manual entry may be possible, or else paper filing.