As per the the rules of Uzbekistan airport customs, there is no import limit to the amount of foreign currency. But it is important to declare the amount in the Customs Declarations form. During your flight to Tashkent, ask for two Customs Declaration forms.
Remember to fill out both the forms. One copy is for the customs and another copy will be stamped and given back to you. You will have to show this copy while exiting the country. The procedure was smooth . Customs was quite laid-back and it took us around an hour to clear customs.
For customs information of other goods, you can refer the below site: