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Knowledge BaseCommon errors

Common errors

Frequent issues and fixes.

Missing cost basis

When the system cannot find the acquisition cost

5 min readUpdated: 10.01.2026

Negative position balance

What a negative position balance means

4 min readUpdated: 8.01.2026
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Podatek Giełdy

Automatic capital gains tax calculation for Polish investors. Stocks, ETFs, crypto, and dividends.

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Auxiliary tool for tax calculations. Not legal or tax advice. Consult a tax advisor.