Hi Sindhu,
There are different ways of toggling between worksheets and dashboard, like toggling based on select , or button ,etc
I'll show using Button and Goto method. (same procedure for toggle from sheet to dashboard as well as vice versa)
Using Button :
1. Create the dashboard. (sample example)
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2. Select the floating option on the left pane and click on button.Then resize the button as per use.
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3. Click on the down arrow and click on edit button, and a dialog box opens.
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4. Select the navigate option from dropdown and tooltip and click on ok.
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5. Then the button can be now used to toggle between sheets. (Press alt + click on the button to toggle between sheets as per tableau)
Using GoTo:
1. Follow same step as above.
2. Press Ctrl + Shift + D . A dialog box opens. select go to sheet option.
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3. Select the target sheet and source sheet.Click on ok.
4. The icon is added on the sheet. click on the button to toggle to required target sheet. (Arrow button)
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Hope this helps you.
For an in-depth explanation check out Tableau Training Course details.