To refresh manually, the refresh button can be used on Tableau Server, more information on this button can be found: Refresh Data or Pause Automatic Updates
To refresh data sources in Tableau Desktop, please use the following: https://onlinehelp.tableau.com/current/pro/desktop/en-us/help.htm
Additionally, this might also be more of the desired functionality: https://onlinehelp.tableau.com/current/pro/desktop/en-us/help.htm#qs_initial_sql_parameters.html This article touches on the use of initial sql parameters in the data source connection which I believe is the desired end result.
Last, if none of the above helps, please reply with some of the following.
1. Data source that is being connected to?
2. Is the data source published to a Tableau Server or to Tableau Online.
3. What are the parameters accomplishing? (filtering to specific range of dates, a department, a region?)