For Stock Transactions TurboTax limits you to 7 digits to the left of the decimal point therefore you cannot enter a number 10 million or greater. To fix this you have to break it up to smaller numbers less than 10 million. However I just discovered a new TurboTax bug. For Total Proceeds and Total Cost Basis it limits you to 9 digits to the left of the decimal point. Therefore when it adds all the Transactions up if the Total Proceeds or Total Cost Basis adds up to 1 Billion or more then the TurboTax calculations go wacko and say you owe some ridiculous amount of Tax. For Example my Total Cost Basis was just under 1 Billion and Turbo Tax showed I owed 369K Tax which was correct. When I added 1 more stock entry which sent the Total Cost Basis over 1 Billion then the Turbo Tax couldn't handle it correctly and said I now owe 4.4 Million in Tax. I only had $5,188 Gain on that transaction so Turbo Tax should have said my Tax owed now is 374K. Instead of going from 369K to 374K Tax owed it jumped to 4.4 Million. On 1 of the TurboTax forms it shows Cost Basis Total 999,999,999.99. If I add 1 more entry that pushes Total Proceeds over 1 Billion then it will show Total Proceeds 999,999,999.99 and at the bottom of the page in small print it says Gross Proceeds - The amounts are too large. Some computed results are incorrect. My Account is under 5 Million but if you trade a lot like I do at the end of the year the Total Proceeds and Total Cost Basis can show huge numbers over 1 Billion. Has anyone else run into this 1 Billion Limit for the Totals which throws the TurboTax calculations way off into some other universe??? How do you get around this TurboTax Bug?