Please go through the following law of Zakat which is summarized in the best way possible and feel free ask your follow-up questions in case of any confusion.
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Some important points in your scenario that must be kept in mind:
1) There is 10% production Zakat applicable to your salary and production zakat (or earnings zakat) is separate from Zakat on wealth (or zakat on savings or zakat on assets) which is calculated at 2.5% at year-end.
2) The inheritance amount will become part of your welath and hence would be subject to 2.5% Zakat at year-end (if still with you at that time).
3) Total of zakat obligation (production+wealth) can be offset against all the government taxes paid throughout the year.