I cannot connect these two part on the same Sketch. They are in different planes. How can I connect them so the fillet would look like this image?
As there are numerous ways that the part could have been modeled, it is difficult to state exactly what should be done to correct the problem in your specific situation. Attaching the model or at least an image of the feature tree to your post would have provided additional information with which us fellow forum users could use to guide you towards a solution.
However, that said, the main problem that you are having is that the web/rib between the two circular bosses has been sketched as tangential to the lower larger boss and, therefore, only touches it in a single line across the outer diameter. If you edit the sketch of the web/rib so that it extends to the center or the inside diameter of the boss, they should be joined together across the whole thickness of the web/rib rather than the single contact line.
Hope this helps.
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