Discuss the successes and failures of Federalism during Washington's administration.

Federalism, as espoused by the Federalist Party, was in favor of a strong central government which could impose tariffs and organize a national bank. Washington belonged to no political party, but his views were broadly Federalist, whereas his key political opponents, led by Jefferson, rejected this approach to government and were particularly opposed to the idea of creating a national bank.
One of the key successes for Federalism under the Washington administration, then, was that the United States' first National Bank was established in 1791, despite objections. Although there was no provision made for a national bank in the original Constitution, the Federalists argued that this was the best means of dealing with the young country's debt and standardizing currency across the nation. The Washington Administration also established US Customs after the Tariff of 1789, and the US Mint to print the currency for its new National Bank.
The attempts to impose tariffs by Washington's administration did not run smoothly; tariffs on whiskey led to the Whiskey Rebellion of 1791. However, the federal government was able to assert itself here in a way that showed its strength: Washington personally led an army which suppressed the rebellion without the need to actually engage in warfare. The demonstration that the federal government could raise an army as a threat allowed it to impose its will, as this showed it was capable of decisive action where unrest threatened.
Areas where Federalism failed during the Washington Administration were mainly related to issues championed by Alexander Hamilton but which political opponents felt were too free an interpretation of the Constitution. Hamilton proposed, for example, federal supervision and generation of infrastructure, a protective tariff, and state-owned munitions factories, with those running private factories to be subsidized. Many felt that this was far too much control for the federal government to wield, and debate over the issue alienated many, including James Madison. Further economic suggestions proposed by Hamilton were generally rejected, and Congress became increasingly bipartisan as a result of his views (and Washington's broad support of them).
https://www.history.com/topics/us-presidents/george-washington

https://www.ushistory.org/us/18b.asp