No. You cannot claim income earned in Massachusetts as New Hampshire income. The income is sourced to the point of delivery. That's where the sale took place.
Massachusetts says: "Massachusetts source income includes items of gross income derived from or effectively connected with any trade or business, including any employment, carried on by the taxpayer in Massachusetts, whether or not the non-resident is actively engaged in a trade or business or employment in Massachusetts in the year in which the income is received."
See: 830 CMR 62.5A.1: Non-Resident Income Tax
Intuit's QuickBooks Self-Employed works with TurboTax Self-Employed Online may help you keep track of things.
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