Manage Customers and income

I can't change my inventory start date because it can't be before the last transaction, but I can't change the bill date with this product because it has to be after the inventory start date. So what I am meant to do? As a result I can't sync all my orders from bigcommerce because the order date (pre-orders) are before the inventory start date. Also in the bill it has the cost in USD, but then in the products list I have to manually enter the cost for every single product but not in USD. This inventory module is just a mess. Please help.

the system can not update the bank transaction 

the software is showing entries more than once in books

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I need the full setup invoice along with QR Code

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I need to register a product that has several mesuares (S - M - L - XL) and diferents colors. Is this possible?

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Contact me

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I've multi-currency enabled, but "Sales price/rate" on "Products and Services" is still only available in one currency. Is there a way to have currency-specific sales rates?

In invoices, how can I add both start AND end dates per line item? So far it seems only possible to add one service date, but I'd need a start AND end date per line item.

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When I try to create an estimate, I have to either select an existing product, or add a new one, but I don't want it to go to my inventory unless the customer accepts the estimate, and I go ahead and buy the items from the supplier.

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Can I change anything in QBO settings - So it doesn't create two invoices with same number ?

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I tried to clear browsing data, but no success