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Why am I getting an "authentication failure" error when submitting?
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How do I agree to the declaration and submit my return?
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Can I download a PDF of my submitted return or tax calculation?
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How do I amend a previously submitted return?
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Why can't I edit or review sections after submitting?
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Can I submit a Self Assessment return without Government Gateway credentials?
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Can I file previous year Self Assessment returns with AbraTax?
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Can I submit late Self Assessment returns through AbraTax?
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If I submit an amended return, will HMRC receive both returns?
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What should I do if HMRC says a return has already been submitted?