Are you referring to an employment application or a citizenship application? If you are applying for a job and don't have specific dates, you can just provide your best approximation of the dates (or years).
Frank W. Chen has been licensed to practice law in California since 1988. The information presented here is general in nature and is not intended, nor should be construed, as legal advice. This posting does not create any attorney-client relationship with the author. For specific advice about your particular situation, consult your own attorney.
As long as you are truthful and make good faith estimate, you should be ok
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