i need to get sales report of a specific period how can i get??
Have you read this release notes
Also, see the Guide concerning those reports: https://guides.manager.io/12310. Note, however, that those reports only take sales by sales invoice into account, not cash sales. You may also get what you need simply by creating a Profit and Loss Statement for the time period, where your sales will appear in whichever income account(s) you posted them to. You can then drill down on the account balances.